Automatic Reorder Point Planning:
1. The objective of the Automatic Reorder point planning is to calculate the Reorder level based on the past consumption
2. The master data setting are as below
Material Master = MRP Type
Forecast View = Set up with appropriate forecast model selection
3. When the Forecast is run for this material, then based on the projected forecasted values and the Replinishment lead time settings the Reorder point will be calculated.
The standard SAP Help is avaialble here
http://help.sap.com/saphelp_47x200/helpdata/en/7d/c27a3b454011d182b40000e829fbfe/content.htm?frameset=/en/7d/c279d3454011d182b40000e829fbfe/frameset.htm¤t_toc=/en/7d/c2821c454011d182b40000e829fbfe/plain.htm&node_id=210